1.A research group is investigating the potential infectious nature of a disease. From ulcerative skin lesions in mice they were able to grow as pure cultures a Gram negative microorganism. They inoculated this microorganism into the skin of healthy mice and reproduced the same ulcerative skin lesions. According to the Koch’s postulated these experimental evidences are sufficient to confirm that...
Autoimmune diseases Complete the following statements to assess your understanding of autoimmune diseases. Not all choices will be used. rheumatic fever The immune system usually distinguishes the difference between cells of the body and foreign invaders, but an autoimmune disease results when or antibodies mistakenly attack the body's own cells as if they bear foreign antigens. myasthenia gravis The disease...
Our immune system is very good at detecting bacterial flagella as a foreign antigen but our eyes are not. Which of the following can help our eyes see bacterial flagella? A. Light microscopy with flagella stain B. Fluorescence microscopy with flagella probe C. Transmission electron microscopy D. All of the above
True or false: A helper T-cell can directly recognize and bind to antigens on the surface of pathogens. If false, make it a correct statement.
15. Cytokines produced in an inflamed tissue but induce fever by entering the blood stream and effecting neuronal cells are described to have what type of effect? a. Autocrine b. Paracrine c. Endocrine d. None of the above 1 6. Which of the following is NOT true about chemokines? a. Form a gradient to direct immune cell trafficking b. Induce...
can some one help me i have to write essay about this Please discuss the mechanism that Neisseria gonorrheae, E.coli , staphylococcus saprophytic and HIV utilize to cause disease in the urogenital tract. You must state what disease these microorganisms cause. In addition, please list and explain the host immune defenses that the microbe wold have to overcome to be...
(Marks 10 X4-40) Answer all questions: " Biocompatibility" of materials. Also describe the tenm 1, (o) Describe what you u know about "Biocompatibility" of materials. A foreign body reaction in light of healing upon implantation of a biomaterial . (b) Discuss the role of mechanical stimuli in growing engineered tissue. How do cells in engineered bone or ligament tissue sense...
50. Both Fissio n and fusion release large amounts of energy because they produce products with higher binding energies per nucleon, making them both pot sources of energy needed to produce electricity. However, only fission has been practical since fusion requires high ential to occur 51. The transformation of one element into another known as colliding particles at high velocities...
In general, the immune response to extracellular antigens involves: 1. the cellular arm of the immune system 2. the red blood cells of the circulatory system 3. adhesion molecules 4. the humoral arm of the immune system 5. all of the above
Xenotransplantation raises concerns among bioethicists for which, if any, of the following reasons We have not yet successfully transplanted a non-human organ or tissue into a human; It is prohibitively expensive and insurance companies will not cover the procedures; While there are known risks, there are also unknown risks that may be difficult to manage; Animals are far healthier than...